Assembly Theory
A scientific theory developed by Lee Cronin that quantifies the complexity of any object by the number of steps to create it and its copy number, suggesting a process akin to evolution.
Videos Mentioning Assembly Theory

Sara Walker: The Origin of Life on Earth and Alien Worlds | Lex Fridman Podcast #198
Lex Fridman
A theory developed by Sarah Walker and Lee Cronin that measures the complexity of objects by the shortest path required to assemble them from elementary parts, used to explain life and detect alien life.

Lee Cronin: Controversial Nature Paper on Evolution of Life and Universe | Lex Fridman Podcast #404
Lex Fridman
A scientific theory developed by Lee Cronin that quantifies the complexity of any object by the number of steps to create it and its copy number, suggesting a process akin to evolution.

What Is Life?: A Conversation with Sara Imari Walker (Episode #388)
Sam Harris
Sara Imari Walker's theoretical framework, developed with Lee Cronin, aimed at explaining the origin of life by focusing on the construction of complex objects over time and the role of information.

Alien Debate: Sara Walker and Lee Cronin | Lex Fridman Podcast #279
Lex Fridman
A fundamental theory proposed by the guests that aims to explain what life is by quantifying the complexity and causal history of objects in the universe, using an 'assembly index'.